eth/tracers: add support for block overrides in debug_traceCall (#24871)

This PR adds support for block overrides when doing debug_traceCall.

- Previously, debug_traceCall against pending erroneously used a common.Hash{} stateroot when looking up the state, meaning that a totally empty state was used -- so it always failed,
- With this change, we reject executing debug_traceCall against pending.
- And we add ability to override all evm-visible header fields.

core/evm.go

@@ -84,6 +84,11 @@ func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash
 	var cache []common.Hash
 
 	return func(n uint64) common.Hash {
+		if ref.Number.Uint64() <= n {
+			// This situation can happen if we're doing tracing and using
+			// block overrides.
+			return common.Hash{}
+		}
 		// If there's no hash cache yet, make one
 		if len(cache) == 0 {
 			cache = append(cache, ref.ParentHash)